MK ExLRT User manual

OPERATOR MANUAL EXLRT
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OPERATOR MANUAL
EXLRT
XLR-104-1
Author:
Giuseppe Prisco Date: 12th December 2019
Reviewed:
Jamie Spiller Date: 5th February 2020
Approved:
Alan Wilson Date: 6th February 2020

OPERATOR MANUAL EXLRT
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MODIFICATIONS
Revision Date Modified by Changes / ECR
1 6th February 2020 Giuseppe Prisco First Release
Pictures, graphics, formatting, and/or detail that describes the functionality is subject to change
to the discretion of MK Test Systems Ltd
MK Test Systems Ltd believes the information described in this safety manual to be accurate and
reliable. However, no responsibility, financial or otherwise, is accepted for any consequence arising
out of the use of the information contained within this safety manual.
The information contained within the safety manual is the property of MK Test Systems Ltd, and
reproduction in whole or part shall not be undertaken in any form, by any means, for any purpose
without written authorisation from MK Test Systems Ltd.
In no event shall MK Test Systems Ltd be liable to anyone or body for special, collateral, incidental
or consequential damages or losses with or arising out of the use MK Test Systems Ltd products.
The information contained within the safety manual is subject to change at any time without prior
notice.
MK Test Systems Ltd reserves the right to revise and improve its products as it sees fit.

OPERATOR MANUAL EXLRT
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Table of Contents
1 Introduction ................................................................................................................................................. 5
2 Hardware ..................................................................................................................................................... 6
Product overview ................................................................................................................................. 6
ExLRT Overview .................................................................................................................................... 7
Buttons ................................................................................................................................................. 8
Indicators ............................................................................................................................................. 8
3 Charging the battery .................................................................................................................................... 9
External charging ................................................................................................................................. 9
Internal Charging .................................................................................................................................. 9
4 Using the ExLRT .......................................................................................................................................... 10
Calibration .......................................................................................................................................... 10
5 Using the integrated self-test fixture ......................................................................................................... 11
6 Functions and features .............................................................................................................................. 12
LCD display ......................................................................................................................................... 12
7-Segment Display and Icons description .......................................................................................... 13
7 Start-up (Power on) ................................................................................................................................... 14
Login (Option) .................................................................................................................................... 14
8 Main Menu ................................................................................................................................................. 15
9 Manual Menu ............................................................................................................................................. 16
Manual measurement modes ............................................................................................................ 17
Overview .................................................................................................................................... 17
10 Continuous mode measurements ............................................................................................................. 18
Starting Continuous ........................................................................................................................... 18
Pausing continuous mode measurements ......................................................................................... 18
Resuming continuous mode .............................................................................................................. 18
Exiting from continuous mode ........................................................................................................... 18
Averaging ........................................................................................................................................... 19
Triggering ........................................................................................................................................... 20
11 Single Shot Measurements ........................................................................................................................ 21
Initiating a single shot test ................................................................................................................. 21
Taking a measurement....................................................................................................................... 22
Exit from single shot mode ................................................................................................................ 22
12 Stray current .............................................................................................................................................. 22
13 INFORMATION MENU ................................................................................................................................ 23
14 ExLRT Unit .................................................................................................................................................. 23
15 Cable .......................................................................................................................................................... 23
16 Calibration Information ............................................................................................................................. 24
17 Settings Menu ............................................................................................................................................ 24
18 Measurement............................................................................................................................................. 25
Averaging? ......................................................................................................................................... 25
Trigger on Percentage? ...................................................................................................................... 25
Trigger on Value? ............................................................................................................................... 25
Change trigger values? ....................................................................................................................... 26
Change % of reading .................................................................................................................. 26
19 Calibration .................................................................................................................................................. 28
20 System ........................................................................................................................................................ 28
21 Calibration Verification .............................................................................................................................. 28

OPERATOR MANUAL EXLRT
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1 INTRODUCTION
This manual is provided to the end user to understand the operation of the ExLRT and its associated
components.
This manual does not include safety information for the ExLRT
Refer to document XLR-927
Do not operate the ExLRT without reading and understanding the Safety Manual.
The manual does not include servicing or repair literature.
There are no user serviceable parts.

OPERATOR MANUAL EXLRT
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2 HARDWARE
Product overview
The ExLRT is a battery-operated device that is designed to measure the resistance of complex
constructed loops for the use of electrically bonding parts within structures and sub-frames. It has an
additional joint mode that can measure the bond joints within the loops.
The ExLRT uses current couplers that non-intrusively couple an AC signal into the loop. A drive coupler
is used to inject the signal with a known voltage and a second coupler is used to measure the current.
To measure individual joints within the loop, a pair of joint probes are used to measure the voltage
presented across the joint resistance. Knowing the voltage and current for each test, the ExLRT
calculates the resistance.
ExLRT
Battery
Charger
AC-DC Power Supply
Loop Cable
Joint Cable

OPERATOR MANUAL EXLRT
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ExLRT Overview
Power input
Joint Connector
Power-on button
USB Connector
Loop Connector
LCD Display
Joint status
indicator
Loop status
indicator
Battery
compartment
Self-test
Buttons
Buttons

OPERATOR MANUAL EXLRT
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Buttons
Five buttons serve the following main functions
1) Start and Stop measurements in manual mode
2) Browse menus
3) Change/Set parameters
Indicators
Two indicators are situated on the top of the ExLRT. The left indicator shows the status of the loop
measurement and the right indicator shows the status of the joint measurements. The indicators act
as repeaters to the LEDs situated on the Loop and Joint cables.
The indicator colours identify the following test status.
Loop status indication Joint status indication
Green Flashing Waiting for loop test to
commence Green Flashing Waiting for user to connect joint probes to UUT
Amber ON Loop test measuring Amber ON Joint test measuring
Amber Flashing Paused State
(Continuous mode only) Amber Flashing Paused State (Continuous mode only)
Red flashing
Loop test error
Red flashing
Joint test error
Drive/Sense Coupler open Joint test intermittent

OPERATOR MANUAL EXLRT
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3 CHARGING THE BATTERY
External charging
Insert the battery into the charger as shown and attach the supplied MK PSU. The table below shows
the list of the LED states to indicate the state of the battery.
Charger State
(Normal working condition) LED 1 (Left) LED 2 (Right)
Ready to Charge (Battery not installed) Off Green
Charging Red Green
Battery Inserted and fully Charged Off Green
NiMH Top-Off Charge/Charged Orange Green
Internal Charging
Simply plug the PSU into the ExLRT to charge the battery. The battery container will display flashing
bars to indicate that the battery is charging.

OPERATOR MANUAL EXLRT
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4 USING THE EXLRT
Calibration
Calibration Verification is a method to verify the ExLRT instrumentation hardware to calibrated
standards. Adjustment is performed using MK PC software and is run by a user with appropriate
permissions. Once the verification is performed and the ExLRT has passed, the ExLRT and will display
the icon when the correct combination of cables are connected to the ExLRT.
Calibration Warning Date:
This is set within the PC ExLRT software at the time of verification. It is used as a warning to the user
when the ExLRT is due for calibration.
Calibration Expiry Date:
This is set within the PC ExLRT software at the time of verification. the Calibration will expiry once the
expiry has elapsed.